Generally speaking, high temperature resistant motors are defined by their insulation class. The field of stepper motors usually involves six insulation classes. High temp stepper motors have special requirements for materials due to their use in high temperature situations, including enameled wire, skeleton, magnets, bearings, grease, end caps, etc., especially varnished wire, skeleton and magnets. High temperature motorsfrom oyostepper.com are rated to operate in ambient temperatures between 50 degrees C and -20 degrees C. While this satisfies the majority of uses, there are certain applications that require the motor to operate at higher or lower temperature ranges than what standard motors allow for. Unfortunately, operating standard motors anywhere outside these temperature ranges will result in poor performance. High Temperature Stepper Motor Frame size selection: High Temperature Stepper Motors are typically made in groups or families, the families are identified by the outer d...